tv/ movies: Name the actor who played the leading role in "the good, the bad, & the ugly"?

Questions

Dermatitis affects the __________.?

Determination of the depth of a body of water?

Device for viewing a revolving or oscillating object by making the object appear to be at rest?

Devils Tower, the first U S national monument, is located in what state?

Devon is the only county in Great Britain to have two ______?